Download User Manual

EtherNet/IP
EtherNet/IP
Overview
EDS File
EtherNet/IP (Ethernet/Industrial Protocol) is a communication
system suitable for use in industrial environments. EtherNet/
IP allows industrial devices to exchange time-critical
application information. These devices include simple I/O
devices such as sensors/actuators, as well as complex
control devices such as robots, programmable logic
controllers, welders, and process controllers. EtherNet/IP
uses CIP (Control and Information Protocol), the common
network, transport, and application layers also shared by
ControlNet and EtherNet/IP. EtherNet/IP then makes use of
standard Ethernet and TCP/IP technology to transport CIP
communications packets. The result is a common, open
application layer on top of open and highly popular Ethernet
and TCP/IP protocols.
EDS—Is the abbreviation for Electronic Data Sheet, a file on
disk that contains configuration data for specific device types.
EtherNet/IP messaging forms:
●
Unconnected messaging is used for connection
establishment and for infrequent, low-priority messages
●
Connected messaging uses resources that are
dedicated in advance to a particular purpose such as
real-time I/O data transfer
You can provide configuration support for your device by
using a specially formatted ASCII file, referred to as the EDS.
An EDS provides information about the device configuration
data’s:
●
Context
●
Content
●
Format
The information in an EDS allows configuration tools to
provide informative screens that guide a user through the
steps necessary to configure a device. An EDS provides all of
the information necessary to access and alter the
configurable parameters of a device. This information
matches the information provided by instances of the
parameter object class. The CIP object library describes the
parameter object class in detail.
Explicit Messaging
EtherNet/IP messaging connections:
●
Explicit messaging connections are general purpose
point-to-point connections. Messages are sent through
TCP protocol
●
Implicit (I/O data) connections are established to move
application-specific I/O data at regular intervals. They are
often set up as one-to-many relationships in order to take
full advantage of the producer-consumer multicast model.
Implicit messages are sent through UDP protocol
AC/DC Drive Profile
In order to provide interoperability between devices from
different manufacturers, there must be a defined “standard”
in which those devices:
●
Exhibit the same behavior
●
Produce and/or consume the same basic set of I/O data
●
Contain the same basic set of configurable attributes
Explicit Messaging is used in commissioning and
parameterizing of the EtherNet/IP board. Explicit messages
provide multipurpose, point-to-point communication paths
between two devices. They provide the typical request/
response-oriented network communication used to perform
node configuration and problem diagnosis. Explicit messages
typically use low priority identifiers and contain the specific
meaning of the message right in the data field. This includes
the service to be performed and the specific object
attribute address.
Note: If Class 1 connection (cyclic data) has been
established, then explicit messages cannot be used to
control output data. However, this restriction doesn’t
apply for IO Data reading.
The formal definition of this information is known as a
device profile.
OPTCQ EtherNet/IP Option Card MN04002005E—August 2012 www.eaton.com
9